function showAlertDiv(msg){
		document.getElementById("alert-popDiv").style.display='block';
		document.getElementById("alert-bg").style.display='block';
		document.getElementById("alert-msg").innerHTML=msg;
	}
		/**
		关闭弹出层
		*/
	function hideAlertDiv(){
		document.getElementById("alert-popDiv").style.display='none';
		document.getElementById("alert-bg").style.display='none';
	}